FFT - Fast Fourier Transform

FFT - Calculates FFT (Fast Fourier Transformation) of selected channels. You can select the type of calculated curve ( Real, Imaginary, Amplitude, Power (dB) ), then select the type of window in which the calculating the curve will be displayed. The window can be Rectangular, Hanning, Hamming, Blackman, Blackman Harris, Flat Top. The last operation is to select the X axis unit value, in either Fractions of Sampling Rate or in Hertz .